Riveting machine



Feb. 12 1924. 1,483,071 Y J. A. CALDER RIVETING MACHINE Filed June 15, 1921 3 Sheets-Sheet l* I y I J. A. CALDER RIVETING MACHINE 3 Sheets-Sheet 2 Filed June l5 1921 Feb. 12 1924. 1,483,071

' J. A. CALDER RIVETING MACHINE l Filed June 15. 1921 3 Sheets-Sheet 3 Patente Feb. l2, 19224.

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u JOHN A. CALDER, OF TORBINGTON, CONNECTICUT, ASSIGNOR TO THE TORRINGTON COMPANY, 0F TORRINGTON, CONNECTICUT, A CORPORATION OF CONNECTICUT.

RIVETING MACHINE.

Application filed June 15, 1921. Serial No. 477,708.

To @ZZ whom t may concern Be it known that I, JOHN A. CALDER, a citizen of the United States, residing at Torrington, in the county of Litchfield, State of Connecticut, have invented certain new and useful Improvements in Riveting Machines, of which the following is a description, reference being had to the accompanying drawing and to the figures of reference marked thereon.

The invention relates to new and useful improvements in riveting machines, and more particularly to a riveting machine which is adapted to head the rivet by a series of light blows.

An object of the invention is to provide a machine of the above type wherein the working position of the riveting hammer is shifted during the riveting operation by a bodily shifting of the actuating member therefor toward and from the article being riveted.

A further object of the invention is to provide a riveting machineof the above type wherein the riveting hammer is actuated by the rotating shaft carrying the operating member shaped so as to impart a plurality of reciprocations to said riveting hammer during each rotation of said shaft, and wherein said shaft is so mounted that it may be movedy bodily toward and from the article being riveted for varying the Working position of the riveting hammer during the riveting operation.

These and other objects will in part be obvious and will in part be hereinafter more fully disclosed.

In the drawings which show by way of illustration one embodiment of the invention Figure 1 is a perspective view of a riv.

eting machine embodying the improvements;

Fig. 2 is a view partly kin side elevation and partly in vertical section on the line of the operating shaft;r

Fig. 3 is a view partly in transverse section and showing the general arrangement of the parts at the time when the riveting operation is about to begin;

Fig. 4 is a similar view but showing the position of the parts at the completion of the riveting operation;

Fig. 5 is a perspective view of a latch knitting needle which has been riveted on the machine, and

Vhammer is held yieldingly in contact with the rotating operating device. The shaft carrying the rotating device is mounted in an eccentric sleeve, and this eccentric sleeve is capable of being oscillated for moving the shaft bodily toward and from the base of the machine, and this in turn'moves theI actuating member bodily toward and from the anvil and thus during the reciprocations of the hammer, causes the working position to gradually shift toward and from the article being riveted. By this arrangement, a series of very light blows may :be imparted to the rivet, and as the rivet shortens through the riveting down of its head or heads, the hammer follows up the rivet until the riveted operation is completed.

Referring more in detail to the drawings,

the improved riveting machine consists of a supporting base 1 which is secured to the bench or table by means of screws 2, 2 passing through elongated slots in the base 1. Said base carries an upright standard 3 in which is mounted a rotating shaft 4. Said shaft 1 is rotated by a suitable belt wheel A5. Mounted on the base 1 is a bracket 6 Awhich is adapted to support an anvil 7 on which the article to be riveted is placed. lThe bracket 6 is secured to the base 1 by means of bolts 8. Said bracket is formed with a slot 9 in which the anvil is placed, and the anvil rests on the wedge-shaped support 10. This wedge-shaped support 10 is capable of being moved in or out by means of screws 11 and held in any set position. By adjustingthis wedge-shaped support 10, the anvil may be raised or lowered asdesired.

The article to be riveted, as abovenoted, is placed on the anvil, and the rivet is up set by means of a riveting hammer 12. This riveting hammer 12 is secured at the lower end by a-reciprocating bar 13. Said bar 13 is mounted to reciprocate vertically in a suitable guiding recess formed in part in the standard 3-and in part in a cover plate 14.v At the lower end oit the reciprocating bar 13 there is a slotted head 15 in which the hammer 12 is secured by means of a set screw 16. At the upper end of 'the reciprocating bar 13 there is a head 17 which is rigidly secured to the bar 13. `rlhis head is provided with upwardly projecting arms 18 and 19, and between said arms there is a roller 20. Said roller is mounted on a bolt 21 which is held on the arms 18 and 19 by a nut 22. On the extreme right-hand end of the shalt 4 there is an actuating device 23 which as shown in the drawings, is provided with 'eight fiat sides. Said actuating device is rigidly clamped on the shaft 4 by means of a nut 24.

Extending laterally jr'roin the head 17 are arms 25, 25. Mounted on the upper end oi the standard 3 is a bracket 26. Said bracket is provided with spaced upwardly extending arms 27, 27 between which is placed a bar 28, which bar in turn is provided with the laterally projecting arms 29, 29. Springs 30, 30 connect the arms 25 and 29, respectively. These springs normally exert a yielding lifting action on the arms 25, 25 and thus raise the roller 2O and hold the same in yielding contact with the actuating device 23. .et threaded bolt passes through the bar 28 and bears against the bracket, and serves as a means tor raisingthe bar 28 to increaserthe tension on the springs 30, 30.

From the above it will be apparent that as the shaft 4 rotates, the hammer l2 will have imparted thereto eight reciprocations for one rotation of the shaft. Said hammer will be forced downwardly positively and lifted by means of springs 30, 30.

The shaft 4 is mounted in an eccentric vsleeve 32. Said eccentric sleeve is in turn mounted in a suitable bearing on the standard 3. This eccentric sleeve projects to the lett of the standard as viewed in Fig. 2, and the arm 33 is clamped on the eccentric sleeve by means of a clamping screw 34. The standard 3 is provided with a rearward extension 35 and a lever 36 is pivoted at 37 to said extension 35. Said lever is connected to the arm 33 by means of a link 38. There is a recess formed in the lower tace of the arm 33 in which is placed a hardened block 39, and the link 38 has a ball head 40 engaging a semi-spherical recess in this hardened block 39. There is also a hardened block 41 set in the end of the lever 36 which is provided with a semispherical recess adapted to receive a ball 42 on the lower end of the link 38. A spring 43 connects the arm 33 and the lever ,36, and holds the balls on the ends of the i link in their respective sockets in the hardened blocks. Through this connection, the movement of the lever 36 in an upward direction will be positively imparted to the arm 33 and thus the eccentric sleeve positively turned in a clockwise direction as viewed in Figures 3 and 4. it the rear end of the lever 36 there is a roller 44 which bears on a cam 45 carried by the operating shaft 46. This cam 45 is so shaped as to gradually depress the rear end of the lever 36 and when the point :c is reached, then the lever 36 is quickly released so that it may return to its normal position for the beginning ot the next riveting operation. spring 47 is connected to the lever 33 at its upper end and to a pin 48 carried by the standard 3 at its lower end. This spring normally tends to hold the roller 44 in Contact with the cam 45 and operates to depress the outer end oi' the arm 33 when the roller passes the point a? on the cam.

ln Figures 5 and 6 l have shown a latch needle L which is provided with a latch Z, and this latch is riveted to the body portion of the needle by a rivet r. The rivet r is preferably provided with threads r and both ends of the rivet are upset and the central portion of the rivet slightlyv enlarged during the riveting operation.

lt is essential that the heads et the rivet shall be well seated in the recesses in the cheeks of the body portion of the needle, and this is best accomplished by a series ot light blows which follow up the rivet as it shortens. The machine described above is particularly adapted for this purpose, although it may be equally used in connection with the heading of any small rivet.

ln the operation of the machine, the latch needle is placed between the hammer and the anvil, with one head of the rivet resting on the anvil and the other head in range of the hammer. As the shaft 4 rotates, the riveting hammer will be given very rapid vibrations,-eight reciprocations for each rotation ot the shaft. When the article is placed, then the shaft. 46 which is in Continous operation will cause the lever 36 to be depressed at its upper end, raised at its inner end, and the raising of the lever at the inner end raises the outer end of the arm 33 and this turns the eccentric sleeve so as to bodily lower the shaft 4, and the actuating device 23 carried thereby. .is the actuating device is lov-.'ered, the reciprocating bar 13 shifts its working position and the hammer comes down into range of the rivet, makes contact therewith, gradually shortens the rivet as it is headed, following up the rivet as it shortens through the continued gradual oscillation of the eccentric sleeve. At the finish of the riveting operation, the cam 45 is turned to a position so that the point w is reached by the roller 44, and

the roller 44 passing off from this point a' is released from the cam, so that the spring 47 may quickly depress the upper end of the arm 33 and thus raise the riveting hammer from contact with the article.

It is obvious that minor changes in the details of construction may be made without departing from the spirit of the invention as set forth in the appended claims.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent, is

l. A riveting machine including in combination, a riveting hammer, a rotating shaft, a reciprocating member carrying said hammer, an actuating member carried by the shaft for moving said reciprocating member, means for yieldingly holding said reciprocating member in contact with the actuating member on the shaft, and means for shifting the actuating shaft toward and from the article being riveted for varying the reciprocating position of the riveting hammer.

2. A riveting machine including in combination, a riveting hammer, a rotating shaft, an actuating member carried by said shaft having a plurality of flat sides, a reciprocating member carrying said hammer, and means for yieldingly holding the reciprocating member in Contact with the actuating member on the shaft, and means for bodily shifting the actuating shaft toward and from the article being riveted.

3. A riveting machine including in combination, a riveting hammer, a rotating shaft, an actuating member carried by said shaft having a plurality of fiat sides, a reciprocating member carrying said hammer, means for yieldingly holding the reciprocating member in contact with the actuating member on the shaft, a sleeve in which said shaft is eccentrically mounted, and means for oscillating said sleeve for moving the shaft toward and from the article being riveted.

4. A riveting machine including in combination, a riveting hammer, a rotating shaft, an actuating member carried by said shaft having a plurality of flat sides, a reciprocating member carrying said hammer, means for yieldingly holding the reciprocating member in contact with the actuating member on the shaft, and positive means for moving said sleeve for shifting the shaft gradually toward the article being riveted during the riveting operation.

5. A riveting machine including in com bination, a riveting hammer, a rotating shaft, an actuating member carried by said shaft having a plurality of flat sides, a reciprocating member carrying said hammer, means for yieldingly holding the reciprocating member in contact with the actuating member on the shaft, positive means for moving said sleeve for shifting the shaft gradually toward the article being riveted during the riveting operation, and yielding means for quickly lifting the shaft to its extreme raised position after the riveting operation is completed.

6. A riveting machine including in combination, a supporting base, a standard, a reciprocating bar mounted on said standard, ahammer carried at the lower end of said bar, an anvil carried by the base, a rotating shaft mounted on said standard, a flat sided actuating member fixed to said shaft, a roller carried by said recirocating bar, springs for raising the reciprocating bar to hold the roller in contactv with the actuating member on the shaft, and means for bodily raising and lowering the shaft for moving the riveting hammer toward and from the anvil.

7. A riveting machine including in combination, a supporting base, a standard, a reciprocating bar mounted on said standard, a hammer carried at the lower end of said bar, an anvil carried by the base, a rotating shaft mounted on said standard, a flat sided actuating member fixed to said shaft, a roller carried by said reciprocating bar, springs for raising the reciprocating bar to hold the roller in contact with the actuating member on the shaft, a sleeve in which said shaft is eccentrically mounted, an arm attached to the sleeve, a lever connected to said arm for moving the arm positively to lower the shaft during the reciprocations of the hammer, and a cam for engaging and actuating said lever.

8. A riveting machine including in combination, a standard, a reciprocating bar carried by the standard, a hammer mounted at the lower end of said bar, an anvil beneath said hammer, a rotating shaft mounted in said standard, an actuating member carried by the shaft and having a series of flat sides, means carried by said bar adapted to engage said member, springs connected to the reciprocating bar for yieldingly holding the means carried thereby in engagement with the actuating member, and means for varying the tension of said springs.

In testimony whereof, I affix my signature.

JOHN A. CALDER. 

